Conceptualism n. (Metaph.) A theory, intermediate between realism and nominalism, that the mind has the power of forming for itself general conceptions of individual or single objects.
... respectively propounded by Hermogenes, Socrates, Cratylus, may be described as the conventional, the artificial or rational, and the natural. The view of Socrates is the meeting-point of the other two, just as conceptualism is the ... — Cratylus • Plato